The definition of culvert is a tunnel or a drain under a road or a railway that carries a stream or drainage from one side to the other.
A hollow or natural passage under or into the earth, especially one with an opening to the surface.
A hall or corridor that is an entrance or exit or onto which several rooms open; passageway
(--- Chiefly Brit.) An underpass for pedestrians
Find another word for underpass. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for underpass, like: bridge, culvert, cave, passage, subway (British), tunnel and subway.